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(No Model.) A 2 Sheets-Sheet 1.

F. W. WIES'BBROGK. APPARATUS IHORDRYING GRAIN.

N. 267.813. Patented Nov. 21.118812.

.Wassen @veia/f5?? fw@ N (No Model.) 2 Sheets-#SI1eet;` 2.

F. W. WIB'SEBROCK-` APPARATUS POR DRYING GRAIN. `No. 267,813. i PatentedN0v.21,\1882.

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N. PETERS. FhulLnhugmpher, wnshintun. D. C,

UNITED STATES PATENT @Erica 'FREDERICK w. wIEsEBnocx, oENEw YORK, N. Y.

"APPARATUS FOR DRYING GRAIN.`

SPECIFICATION forming` part of Letters Patent No. 267,813, datedNovember 21, 1882.

Application tiled March 14, 1882. (No model.)

To all whom-it may concern Be itknown that I, FREDERICK W. WIEsE- BRocK,a citizen of the United States, residing at New York, in the county andState ot' New York, have invented new and useful Improvelments inApparatus for Drying Grain, Src., of

whichthe following is a specitication.

This invention relates to improvements in that class of apparatus fordrying grain and other like material in which the materialv to betreated is subjected to the action ot' heat while being passed through aseries of communicating rotary drying-cylinders.

My invention consists in the combination of a housing or casinga seriesof inclined rotary drying-cylinders having their ends extended outsidethe housing or casing, each cylinder having a spout-cap provided with adampered Ventilating iiue or pipe, blast-pipes, and mechanism forrotating the cylinders located outside the housing or casin g.

Other features of the invention will be hereinafter described, andpointed out in the claims.

The inventionis clearly illustrated in the accompanying drawings, inwhich Figure l is a vertical longitudinal section of my improved dryingapparatus. Fig. 2 is an end view; Fig. 3, a vertical section through thefurnace, showing the blast-hues and fan; and Fig. 4 is a centralvertical section.

Like letters indicate like parts.

Referring to the drawings, the letter A denotes the rotarydrying-cylinders, the ends of which project beyond the housing B. Thishousing may be constructed of brick or other suitable material in anyapproved manner. The dryingcylinders are arranged one .above the other,and alternately incline slightly in opposite directions, as shown inFig. 1. These cylin'ders are preferably formed of metal, and anyconvenient number may be employed.

Each'drying-cylinder A is provided `with a spout-cap, C, by means ofwhichit communicates with the adjoining cylinder. These spoutcaps are soarranged in connection with the inclined positions oi' the cylindersthat the grain or other material, as it passes through the cylindersalternately in opposite directions, is constantly carrieddownward fromthe hopper D to the discharge-spout E at the lower end of the bottomcylinder. The feed-hopper D communicates by a horizontal pipe, a, havinga screw-conveyer, b, with the upper end ot' the top cylinder. Within thecylinders are curved iianges or wings c c, which are so arranged uponthe inner walls of said cylinders as to lit't portions ofthe graincontained therein and carry it partly upward with the rotation ofthecylinders, so as to agitate the mass of grain and expose it morethoroughly to the action ot' the heated currents of air passing throughand around said cylinders.

'In each rotary drying-cylinder is a'horizontal perforated blast-pipe,d, which communicates with a vertical hot-air pipe, e, that is arrangedin a heating chamber or chimney, f, above the furnace F. This heatingchamber or chimney f is provided with a vertical partition,f, whichextends nearly to the closed top, a .passage being afforded at the topof the partition for exit of smoke and other products ot' combustion,which ascend on one side of the partition and descend on the other, soas to finally escape through an opening, f2, at the back of the furnaceand near the ground.

The curved orv bent pipe e, which is arranged titions h and horizontalslidable partitions h,

which latter are adj usted, by means ot' the rods or handles z', so asto regulate and control the passage ot' heated currents in contact withthe exterior surfaces of said drying-cylinders, as shown in Fig. 4.

The spout-caps G at the ends ot' the cylinders are each provided with aVentilating-pipe, r, (shown in dotted lines, Fig. 1,) all of said pipesconnecting with a chimney or stack, H, i'or the purpose of permittingthe escape of heated air-currents laden with moisture absorbed from thegrain. These pipes Ick are provided with dampers on, that may bemanipulated so as IOO to confine the air within the respective cylindersfor suchlengths of time as will be suflicient to enable it to absorbmoisture to its fullest capacity before being permitted to escape, thuse'Eectin g a large economy in the quantity of fuel ordinarily required.By this arrangement of a dampered Ventilating pipe or ue for eachcylinder, which provides for the escape ofthe moisture absorbed from thegrain,

I obviate all liability of its coming in contact with the exterior ofthe cylinders, and also prevent the formation of acid gases that mightbe generated by its contact with' the gaseous products of combustion,and thus have an injurious effect upon the grain or other material beingdried. This construction also results in an economy of fuel, as thecondensation of moisture, which would be liable to counteract the effectof the fire-gases, is thereby effectually prevented. In order to preventthe return of the condensed moisture to the drying apparatus, thechimneyH is made to project at the back, and is provided with a trap, a,as shown in Fig. 4. The spout-caps C are provided with openings for thepassage of the blast-pipes d, and they also have doors c', forpermitting aecess to the spouts and cylinders, and openings c2, throughwhich the contents of thecylinders may be inspected without opening saiddoors.

The drying-cylindersAare caused to revolve by means of the pinions orspur-gears K,whieh are attached to the horizontal shafts L on each side,the inner ends of said shafts being supported in bearings located uponcross-bars M, that are arranged between the pillars N N, as shown inFig. 2. VThese pinions K engage with ring-gears on the adjacent ends ofthe g cylinders, the opposite ends of which are supported and rotateupon suitable rollers, which, however, are not shown. The shafts L, towhich the pinions K are attached, .are provided at their opposite endswith bevel-gears O, that mesh with similar gears, P, secured to avertical shaft, Q, that is journaled in the projecting bearings or armsR, attached to the housing. The vertical shaftQ is provided near itslower end with a bevel-gear, P', that meshes with a similar gear, P2, ona horizontal shaft,that may be provided with a differential pulley forregulating and varying the speed of the cylinders at pleasure. rlhe gearO on the upper horizontal shaft, L, meshes with a gear, S, on the shaftof the conveyerscrew b, thereby operating the latter at the same rate ofspeed that is imparted to the rotary drying-cylinders.

1n order to protect the gearing from the effects of the heat, as well asto prevent the escape of the same from the space surrounding thedrying-cylinders, metal plates p are attached to the inner sides of theiron cross-bars M, and arranged to iit around the cylinders withoutimpeding their rotation. The framing of the spout-caps is attached tothe outer sides of the cross-bars M in such a manner as to prevent theescape of heat or the access of cold air. By means of the doors` inthese spout-caps access may be had for the purpose of lubricating thegearing and rollers when required.

-By extending the ends of the rotary dryingcylinders so as to projectbeyond the walls of the housing I am enabled to arrange the operatingmechanism in such a manner as to be unaffected by the heated currents ofair circulatingwithin the housing or chamber. The advantage of thisconstruction will be apparent.

In operating the apparatus the grain or other similar material to bedried is conveyed into the hopper D by any suitable means, and passesdirect to the horizontal eonveyer-pipe a, whence it is fed by the screwbinto the upper rotary drying-cylinder, A, being therein subjected tothe great degree of heat which is naturally accumulated in the upperportion of the apparatus. By the rotation of this inclined cylinder thegrain is gradually passed to the upper spout-cap, G, and through thesame to the lowerk cylinders and spouts successively,being finallydischarged through the spout E at the lower end of the bottom cylinder.In passing successively through these cylinders the grain is raised andagitated by the wings c c, so as to expose it thoroughly to the heatedair, which absorbs the moisture from the grain, and in its ascentthrough the pipes ick to the chimney H removessaid moisture from .theapparatus. This moisture is finally intercepted and prevented fromreturning to the apparatus by means of the trapn, as before described.Vhen drying such material as cannot be exposed safely to a hightemperature immediately upon its entrance to the apparatus, I mayregulate the degree of heat to be passed by the blast-V pipes, or mayintroduce to the lower cylinder a cold blast, so as to temper the heataccording to circumstances.

It is obvious that the openingsg and f2 may be connected by means of asuitable pipe or IOO IIO

flue, so as to cause the heat that might otherwise escape to be passedinto the space within the housing and be thus further utilized.

It is also apparent that the employment of a nre within the furnace maybe dispensed with and blasts of cold air, instead of hot air, beintroduced to the housing. In drying malt, for instance, it is advisableto introducecold air into the upper cylinder at first, and after'- wardapply heat moderately; otherwise the result would be the production ofgloss malt.

1. The combination, in a grain-drier, of the housingB, with the seriesof inclined rotary drying-cylinders A, having their ends extendedoutside of the housingin which the body or main portion of each one ofthe cylinders is located, the spout-caps G, located outside of thehousing and connecting the ends of the cylinders, and each protided witha dampered ventilating pipe or line, blast-pipes d, and mechanism forrotating the cylinders, also located IIS outside 4of the` housing, saidmembers being constructed and organized substantially as described. y

2. In a grain-drier, the combination, with a housing inclosing a seriesof drying-cylinders, of` the horizontal adjustable heat-regulatingpartitions h', arranged between said cylinders, substantially asdescribed,

3. In agrain-drier, thecombination ofa housing having a suitablechimney, a series of rotary drying-cylinders arranged in said housingand inclined alternatelyin opposite directions, with their endsprojecting beyond the walls of thehousing, a series of cap-spontsconnectin g the ends of said cylinders and provided with suitable doorsand openings for giving access to the cylinders, adjustable partitionsarranged between said cylinders for regulating the passage of heat onthe `outer sides thereof, pipes connecting the spout-caps andchimney/'and provided with dampers for controlling the escape of air andmoisture, a furnace having a heating-chamber and a vertical blast-pipeprovided with horizontal branch pipes communicating with the interior ofthe dryingcylinders, and mechanism for rotating the dryin g-cylin ders,located on the exterior of the housing, all substantially as shown anddescribed.

4. The combination, with the housing inclosing a series of communicatingdrying-cylinders, of the xed partitions h and the horizontal slidablepartitions h', operated by rods Ii, said partitions being locatedbetween the drying-cylinders, substantially as and for the purpose setforth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

FREDERICK W. 'WIESEBROCKl

